I have made an application ordered by a client, and I want to send it for testing. But I don't want to give him the code or the APK. How can provide the app for testing (Uploading online or something), without him receiving the code/apk?
Thanks!
You could run the app on an emulated device and invite your client to a screen cast. This way they get an impression of the app but not the code.
The other (much more unreliable) option would be to rely on ProGuard (to make code stealing harder) and a big red splash-screen saying "demo preview" (to prevent your client from distributing the app).